LyX is a document processor that encourages an approach to writing
based on the structure of your documents and not simply their appearance.
Combining the power and flexibility of TeX/LaTeX with the ease of use
of a graphical interface results in world-class support for creation of
mathematical content (via a fully integrated equation editor) and
structured documents like academic articles, theses, and books.
In addition, staples of scientific authoring such as reference list
and index creation come standard. But you can also use LyX to create
a letter or a novel or a theatre play or film script. A broad array
of ready, well-designed document layouts are built in.

LyX is for people who want their writing to look great, right out of
the box. No more endless tinkering with formatting details, "finger
painting" font attributes or futzing around with page boundaries.
You just write. On screen, LyX looks like any word processor; its
printed output - or richly cross-referenced PDF, just as readily
produced - looks like nothing else.
